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DOI | 10.1126/science.abb0631 |
Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films | |
Jieun Kim; Sahar Saremi; Megha Acharya; Gabriel Velarde; Eric Parsonnet; Patrick Donahue; Alexander Qualls; David Garcia; Lane W. Martin | |
2020-07-03 | |
发表期刊 | Science
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出版年 | 2020 |
英文摘要 | Dielectric capacitors are vital components of electronics and power systems. The thin-film materials of which capacitors are composed are usually optimized by changing the material composition. However, Kim et al. found that postprocessing an already effective thin-film dielectric by high-energy ion bombardment further improved the material because of the introduction of specific types of defects that ultimately improved the energy storage performance. The results suggest that postprocessing may be important for developing the next generation of capacitors. Science , this issue p. [81][1] Dielectric capacitors can store and release electric energy at ultrafast rates and are extensively studied for applications in electronics and electric power systems. Among various candidates, thin films based on relaxor ferroelectrics, a special kind of ferroelectric with nanometer-sized domains, have attracted special attention because of their high energy densities and efficiencies. We show that high-energy ion bombardment improves the energy storage performance of relaxor ferroelectric thin films. Intrinsic point defects created by ion bombardment reduce leakage, delay low-field polarization saturation, enhance high-field polarizability, and improve breakdown strength. We demonstrate energy storage densities as high as ~133 joules per cubic centimeter with efficiencies exceeding 75%. Deterministic control of defects by means of postsynthesis processing methods such as ion bombardment can be used to overcome the trade-off between high polarizability and breakdown strength. [1]: /lookup/doi/10.1126/science.abb0631 |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/281886 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Jieun Kim,Sahar Saremi,Megha Acharya,et al. Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films[J]. Science,2020. |
APA | Jieun Kim.,Sahar Saremi.,Megha Acharya.,Gabriel Velarde.,Eric Parsonnet.,...&Lane W. Martin.(2020).Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films.Science. |
MLA | Jieun Kim,et al."Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films".Science (2020). |
条目包含的文件 | 条目无相关文件。 |
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